The returns date from 2006 until 2015. Last year, Pence's gross adjusted income was $113,026; he paid an effective tax rate of 12.4 percent and gave about $9,000 to charity, according to the campaign.

Since 2006, the family's income has fluctuated between about $188,000 in 2010 to just north of $110,000 now. In 2015, the family's earnings were its lowest in the last 10 years.

Donald Trump has declined to released his tax returns, saying he's being audited by the IRS. Trump's press secretary Hope Hicks said in a statement Friday, "When the audit is complete, Mr. Trump will release the returns."